package com.itheima.reggie.common;

import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Controller;

import java.time.LocalDateTime;

/**
 * 自定义元数据对象处理器
 */
@Slf4j
@Component
public class MyMetaObjectHandler implements MetaObjectHandler {
    /**
     * 插入操作，自动填充
     *
     * @param metaObject
     */
    @Override                   //metaObject : 添加注解的字段
    public void insertFill(MetaObject metaObject) {
        log.info("公共字段自动填充[insert]...");
        log.info("当前的线程id为  ==》", Thread.currentThread().getId());
        log.info(metaObject.toString());
        //设置指定字段的数据
        metaObject.setValue("createTime", LocalDateTime.now());
        metaObject.setValue("updateTime", LocalDateTime.now());
        //从session获取当前操作用户的id(无法获取session)
        metaObject.setValue("createUser", ApplicationContext.getData());
        metaObject.setValue("updateUser", ApplicationContext.getData());

    }

    /**
     * 更新操作，自动填充
     *
     * @param metaObject
     */
    @Override
    public void updateFill(MetaObject metaObject) {
        log.info("公共字段自动填充[update]...");
        log.info(metaObject.toString());
        metaObject.setValue("updateTime", LocalDateTime.now());
        metaObject.setValue("updateUser", ApplicationContext.getData());
    }
}
